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Flat roof extension cost in HP8

A flat roof extension is a great way to add extra space to your home without splashing out on the costs of a pitched roof extension. Often exempt from planning permission rules, you can build a flat roof extension up to 3 metres in height as long as it's not visible from a road. But how much do they cost in HP8?

A flat roof extension ranges from the cheapest of £21,840 (Swan Windows & Son Limited based in WD3) to the dearest of £22,400 (KATELL PROPERTY MAINTENANCE based in WD3), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes. 

Find out how much your flat roof extension will cost in HP8 by posting a job with HaMuch. We'll send it to extension builders in HP8.

Estimates for flat roof extension near HP8

Estimates for common extension builder jobs in HP8;

JobEstimate
Underpinning a house£17,425
Build a two storey extension£87,888
Build a timber frame extension£25,925
Install a swimming pool£80,925
Cost to build a single storey extension£53,509
Cost to build a side return extension£40,661
Install an RSJ£2,125
Build an outbuilding£9,925
Build a mansard loft conversion£51,925
Cost of a loft conversion£33,051
Build a kitchen extension£41,925
Build a hip to gable loft conversion£41,925
Build a granny annexe£86,925
Build a garden office£9,925
Convert a garage£15,925
Build a new garage£18,425
Build a flat roof extension£21,925
Build a dormer loft conversion£41,925
Lay a concrete foundation£6,175
Convert a bungalow loft£28,925
Basement conversion cost£36,661
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Rates for other HP8 trades

Appliance Repair Specialist
Bathroom Fitter
Builder
Carpenter and Joiner
Cleaner
Conservatory Specialist
Door Fitter
Drain Specialist
Driveway Specialist
Electrician
Extension Builder
Fencer
Fire and Security Specialist
Flooring Specialist
Gardener
Handyman
Heating Engineer
Kitchen Fitter
Landscaper
Painter and Decorator
Patio and Path Specialist
Plasterer
Plumber
Removals and Storage
Roofer
Tiler
Window Fitter
Flat roof extension cost in HP8
Estimate Flat roof extension cost in HP8 based on hourly/daily rate (excluding VAT or callout charges)
Business name Flat roof extension cost
J MCNAMEE J & J BUILDERS, Chalfont St Giles, HP8 £21,896
Velonia Interiors Ltd, Buckinghamshire, SL9 £21,888
Saltbox Design and Build, Hertfordshire, WD3 £21,976
Be Illuminated, Buckinghamshire, HP9 £21,984
KATELL PROPERTY MAINTENANCE, Rickmansworth, WD3 £22,400
Beech, Buckinghamshire, Hp7 £21,976
Distinct Build, Buckinghamshire, HP7 £21,976
Hamilton Refurbishments, Great House Farm, Chenies, Buckinghamshire, WD3 £21,856
CONSIDERATE BUILDING LIMITED, Gerrards Cross, SL9 £21,896
JAYEM BUILDING SERVICES LTD, Beaconsfield, HP9 £21,904
6:59 Ltd, Gerrards Cross, Buckinghamshire, SL9 £21,872
J Webb Roofing And Property Maintenance, Beaconsfield, HP9 £21,864
TB Projects, Beaconsfield, Buckinghamshire, HP9 £21,864
Kebbell Development Limited, Beaconsfield, Buckinghamshire, HP9 £21,864
DE Carpentry and Construction, Gerrards Cross, SL9 £21,952
Carlos Gurrea, Hertfordshire, WD3 £21,968
BALECOURT BUILDERS LIMITED, Rickmansworth, WD3 £21,896
Swan Windows & Son Limited, 88a High St, Rickmansworth, Hertfordshir, WD3 £21,840
CLPM Limited, The Pavilion, Micklefield Hall, Sarratt Road, Sarratt, Rickmansworth, Hertfordshire, WD3 £21,856
Cube Design, Herefordshire, WD3 £21,968
Timeless Interiors, Hertfordshire, WD3 £21,968
Asset Lofts, 30 High Street, Harefield, Middlesex, UB9 £21,848
Belvedere, Penn, Greater London, HP10 £21,864
M P TIMLIN (CONSTRUCTION) LTD, Chesham, HP5 £21,888
KPC BUILDING SERVICES LTD, Gerrards Cross, SL9 £21,872

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Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Flat Roof Extension near Gerrards Cross£37£244
Flat Roof Extension near Rickmansworth£36£241
Flat Roof Extension near Chesham£36£237
Flat Roof Extension near Hazlemere£34£235
Flat Roof Extension near Watford£37£239
Flat Roof Extension near Dacorum£36£231
Flat Roof Extension near Hillingdon£56£240
Flat Roof Extension near Berkhamsted£35£227
Flat Roof Extension near Hemel Hempstead£36£231
Flat Roof Extension near High Wycombe£34£237